Volcanic Ash Fall Forecasts (Scheduled)

※In cases where winds in the upper air are weak, or their directions significantly change in altitudes, volcanic ash fall (and lapilli) areas and amounts of forecasts may differ from ones of actual status.

VAFFs (Scheduled)
Scheduled Forecasts are issued every three hours based on an assumed eruption at a specified time, regardless of the occurrence of an actual eruption, for volcanoes posing a hindrance to daily living from ash fall and lapilli fall in order to enable systematic action against possible eruptions. The information provided includes three-hourly potential areas of ash fall and lapilli fall up to 18 hours ahead to support preparedness in local communities.